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functions1 cell secretion - golgi body is concerned with secretion export of macromolecules secretion involves three steps-a
golgi apparatusit is a complex cyctoplasmic structure made up of smooth membrane saccules or cisternae a network of tubules with vessicles and
biogenesis of mitochondriade novo formation ie new formation it is not confirmednew mitochondria are formed by division amitosis of pre-existing
functions of mitochondriacell oxidation - mitochondria plays an important role in atp synthesis during aerobic respiration mitochondria are known as
mitochondriait is the power house of the cell because they are the major centers of release of energy in the aerobic respirationmitochondria and
transport through pmpm regulates transport of materials in and outside of cell pm is semi- permeable as it allows rapid passage to water molecules pm
drawbacks of lamellar modelthis model does not explain the elasticity of pm although this model says that pm is elastic but it also states that head
lipoidal modelsaccording to overton 1902 plasma membrane consists of single layer of lipid because cell permeability is related to lipidsaccording to
compositionproteins 44-76 lipids 20-53 carbohydrates 1-8 protein-lipid ratio 08 1 to 4 1most of lipid are
cell coat glycocalyxpresent in protists and animal cellsusually made of oligosaccharide side chains of glycolipids and glycoproteinscell coat has
functions of cell wall1 provides shape to plant cell rigidity to cells2 functions as a barrier to
plasmodesmatatermed by tangl amp strasburgercytoplasmic protoplasmic bridges between 2 adjacent cellsdesmotubules connects the er of 2
advantages of autonomous transactionsan autonomous transaction once started is fully independent it shares no locks resources or commit-dependency
middle lamellait is thin amorphous intercellular matrix between 2 adjacent plant cellthe cells of plant tissue generally cemented together by an
composition of cell wallcell wall composed of cellulose hemicellulose pectin lignin cutin amp chitincell wall consists of 3 parts -1 matrixhighly
cell walldiscovered by robert hooke 1665 when he saw dead empty cork cellsbonner - studied the chemical nature of cell wallthe cell wall is a rigid
differences between prokaryotic amp eukaryotic cells sno characters prokaryotic cell eukaryotic cell 1 nuclear membranenuclear
cytoplasmname proposed by strassburger according to muhlethaler and frey- wyssling fluid outside nucleus is called cytoplasmtwo parts of cytoplasm1
modern cell theoryalso known as cell doctrine or cell principlecell theory cell lineage theory cell principleschleiden-schwanns cell theory and
short coming of cell theory exceptions of cell theoryi viruses can be considered as exception to cell theory they are made
objection of cell theory reasons of discartioni living organism are composed of various types of cells and their product but
cell theoryproposed by mathias jacob schleiden 1838 jerman botanist theodore schwann 1839 jerman zoologistit consists of 5 fundamental facts -i body
history of the cellterm cytology was given by hertwig he also wrote a book on cell and tissuefather of cytology robert hookefather of modern
cell -cell is the structural amp functional unit of lifestudy of the structure of the cell is called cytologystudy of structure and functions of the
effect on body -1 cancer -benzpyrene present in tobacco is carcinogenic responsible for lung cancer tobacoo chewing also